Component Speaker Eminence Beta 8A
| Specification | |
| Nominal Basket Diameter | 8″, 203.2mm |
| Nominal Impedance* | 8 ohms |
| Power Rating** | |
| Watts | 225W |
| Music Program | 450W |
| Resonance | 65Hz |
| Usable Frequency Range | 78Hz – 4.5kHz |
| Sensitivity*** | 95.1dB |
| Magnet Weight | 34 oz. |
| Gap Height | 0.31″, 7.92mm |
| Voice Coil Diameter | 2″, 50.8mm |
| Thiele & Small Parameters | |
| Resonant Frequency (fs) | 65Hz |
| DC Resistance (Re) | 5.99 |
| Coil Inductance (Le) | 0.49mH |
| Mechanical Q (Qms) | 4.95 |
| Electromagnetic Q (Qes) | 0.42 |
| Total Q (Qts) | 0.38 |
| Compliance Equivalent Volume (Vas) | 23.3 liters / 0.82 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) | 63cc |
| Mechanical Compliance of Suspension (Cms) | 0.37mm/N |
| BL Product (BL) | 9.6 T-M |
| Diaphragm Mass Inc. Airload (MMs) | 16 grams |
| Efficiency Bandwidth Product (EBP) | 156 |
| Maximum Linear Excursion (Xmax) | 3mm |
| Surface Area of Cone (Sd) | 210 cm2 |
| Maximum Mechanical Limit (Xlim) | 7.4mm |
| Mounting Information | |
| Recommended Enclosure Volume | |
| Sealed | 5.7-9.9 liters / 0.2-0.35 cu.ft. |
| Vented | 8.5-19 liters / 0.3-0.67 cu.ft. |
| Driver Volume Displaced | 46.3 cu.in. / 0.76 liters |
| Overall Diameter | 8.24″, 209.2mm |
| Baffle Hole Diameter | 7.13″, 181mm |
| Front Sealing Gasket | Fitted as standard |
| Rear Sealing Gasket | Fitted as standard |
| Mounting Holes Diameter | 0.22″, 5.5mm |
| Mounting Holes B.C.D. | 7.75″, 196.9mm |
| Depth | 3.5″, 89mm |
| Net Weight | 6.6 lbs, 3 kg |
| Shipping Weight | 7.4 lbs, 3.4 kgs |
| Materials of Construction | |
| Coil Construction | Aluminum voice coil |
| Coil Former | Polyimide former |
| Magnet Composition | Ferrite magnet |
| Core Details | Vented core |
| Basket Materials | Pressed steel basket |
| Cone Composition | Paper Cone |
| Cone Edge Composition | Cloth cone edge |
| Dust Cap Composition | Solid composition paper dust cap |
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